176 



PREHISTORIC FISHING. 



which reason it may be supposed that the latter passed around both the knob 

 and the opposite extremity. Found by Mr. Schumacher on Santa Cruz Island.* 

 In the four specimens forming the next group there are no knobs, properly 

 speaking, and other forms appear in their stead. 



Fio. 309. California. (12139). Fia. 310. Maine. (6382). Fio. 311. California. (21873). Flo. 312. California. (7117). 



All i. 

 FIGS. 309-312. Stone sinkers. 



Fig. 309. An object of limestone, rather rudely worked, and slightly com- 

 pressed in the longitudinal direction. Both extremities contract and show traces 

 of asphaltum. The line evidently encompassed both ends. From Santa Rosa 

 Island. Sent by Mr. G. W. Harford. 



Fig. 310. This sinker is made of a chloritic pebble, of which the pecking 

 has not entirely removed the original surface. A cross-section through the 

 middle, therefore, would not present a circular but an irregular form. The upper 

 end shows a slight expansion, barely sufficient to afford a hold to the line when 

 tied around it. Obtained near the Saint Croix River, Maine, and presented by 

 Mr. Gr. A. Boardman. 



Fig. 311. A specimen of kindred form, but larger, and perfectly symmet- 

 rical in shape. The surface of this object, which consists of serpentine, shows 

 distinct striae, produced by the tool with which it was finished. Found on Santa 

 Cruz Island by Mr. Schumacher. 



Fig. 312. Another Californian specimen with a more considerable bulge 

 and a very slender neck, terminating in a hardly perceptible enlargement. The 

 material of this well-worked, but not polished, sinker is hornblende-schist. Sent 

 by Dr. L. Gr. Yates. 



* Mussrs. Squier and Davis figure on p. 235 of "Ancient Monuments of the Mississippi Valley " a specimen 

 exhibiting a greater bulge and more elaborate workmanship. The comparatively small upper end is grooved ; the 

 lower end terminates in a conoid. No special mention of this object is made in the text of their work. 



